<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>径向渐变</title>
    <style>
        .box1{
            width:200px;
            height:200px;
            background-image: radial-gradient(100px 100px,red,yellow);
        }
    </style>
</head>
<body>
    <div class="box1"></div>
</body>
</html>